Regardless of the grade on the slab, the clean surfaces make the coin much more desirable. Also it has a decent strike. That makes it worth more than a less eye appealing example with the same assigned grade.
From Wikipedia Circulated grades[edit] # Grade Grade code(s) Description 1 Poor PO Clear enough to identify, date may be worn smooth with one side of the coin blanked. Coins that are very badly corroded may also fall under this category. 2 Fair FR Some detail shows 3 About Good AG Readable lettering although very heavily worn. The date and design may be worn smooth. 4 Good G, G4 Rims of the coin are slightly worn, design is visible, but faint in areas, with many parts of the coin worn flat. Peripheral lettering nearly full. 6 Choice Good G+, G6 Rims of the coin are complete. Peripheral lettering is full. 8 Very Good VG, VG8 Slight detail shows, with two to three letters of the word LIBERTY showing in coins with this feature. 10 Choice Very Good VG+, VG10 Slightly clearer design-features, with five or possibly six letters of the word LIBERTY showing in coins with this feature. 12 Fine F, F12 Some deeply recessed areas show detail. All lettering is sharp. The letters in the word LIBERTY show completely in coins with this feature, but may be weak. Moderate to considerable, but even wear throughout the coin. 15 Choice Fine F+, F15 Slightly more detail in the recessed areas of the coin. 20 Very Fine VF, VF20 Moderate wear on the higher surface features. 25 Very Fine VF25 All lettering and major features are sharp. Light to moderate, but even wear is seen on the surface and high points of the coin. 30 Choice Very Fine Ch.VF, VF+, VF30 All lettering and major features are sharp. Light, but even wear is seen on the surface and high points of the coin. 35 Choice Very Fine Ch. VF, VF+, VF35 All lettering and major features are sharp. Light, but even wear is seen on the surface and high points of the coin. Traces of mint luster may show. 40 Extremely Fine/Extra Fine Ex. Fine, EF40 Overall sharpness. Light wear seen at the highest points of the coin. Details of the coin are sharp. Traces of mint luster may show. 45 Choice Extremely Fine Ch. Ex. Fine, EF45 Slight, overall wear is seen at the highest points of the coin (examples being raised features). All the details are full and very sharp. Mint luster may show only in protected areas of the coin's surface (Such as between the star points). 50 About Uncirculated/Almost Uncirculated AU, AU50 Traces of wear at the highest points of the coin. At least half of the original mint luster remains. 55 Choice About Uncirculated Ch. AU, AU55 Three-fourths of the original mint luster remains. 58 Choice About Uncirculated Ch. AU, AU58 Almost all of the original mint luster remains
Like Chico Marx said "Sometimes a little bit is a whole lot and sometimes a whole lot is a little bit"